Brave man to irritate worker (7)
I believe the answer is:
gallant
'brave man' is the definition.
'gallant' can be an answer for 'brave' (I've seen this before). I'm not certain of the 'man' bit.
'irritate worker' is the wordplay.
'irritate' becomes 'gall' (galling is a kind of irritating).
'worker' becomes 'ant' (worker is a type of ant).
'gall'+'ant'='GALLANT'
'to' is the link.
Can you help me to learn more?
(Other definitions for gallant that I've seen before include "Courtly" , "Valiant; courteous" , "Flirt" , "Heroic; chivalrous" , "Brave and honourable" .)